Historical Non-Linear Transforms

"Those who do not study the past are doomed to repeat it."

All transform tracings are taken with a native linear sawtooth (NTO) driving
the module input and the horizontal axis of a calibrated oscilloscope.
The vertical axis is the module output.
In all cases there are 10 division per axis and the oscilloscope setting is 500mv/div.
In other words, the axis' are center zero and +/-2.5 volts.
Input knob controls are set to maximum for each module (full transfer function map).


The intended use is to add harmonics to a low harmonic content waveform by precision distortion.
Imagine a sine wave entering the graph from the bottom vertical axis and being "reflected"
out the horizontal axis of the graph from the dark line trace.
The harmonics added by this process are among the richest and most dramatic timbral variations in synthesis.

Serge Wave Multiplier

Top Section Switch set to "Low"
sergtopl.gif (37362 bytes)

Top section switch set to "High"
sergtoph.gif (30594 bytes)

Middle section
sergmid.gif (38088 bytes)

Bottom section
sergbot.gif (37701 bytes)

Triple Waveshaper

Single section
sergwavs.gif (37396 bytes)

"All" sections
sergwval.gif (45177 bytes)

All waveforms measured on continuos time computers designed by Serge Tcherepnin
This study is intended as a tribute to the designer.

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